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/*
* Purpose: Definition file for the oss_userdev driver
*
*/
/*
*
* This file is part of Open Sound System.
*
* Copyright (C) 4Front Technologies 1996-2008.
*
* This this source file is released under GPL v2 license (no other versions).
* See the COPYING file included in the main directory of this source
* distribution for the license terms and conditions.
*
*/
#define MAX_RATE 192000
#define MAX_CHANNELS 64
#define SUPPORTED_FORMATS (AFMT_S16_NE|AFMT_S32_NE)
typedef struct _userdev_devc_t userdev_devc_t;
typedef struct _userdev_portc_t userdev_portc_t;
struct _userdev_portc_t
{
userdev_devc_t *devc;
userdev_portc_t *peer;
int audio_dev;
int open_mode;
int port_type;
#define PT_CLIENT 1
#define PT_SERVER 2
/* State variables */
int input_triggered, output_triggered;
};
struct _userdev_devc_t
{
oss_device_t *osdev;
int active;
oss_mutex_t mutex;
int open_count; /* 0=not in use, 2=both client and server in use */
int create_flags; /* Flags from ioctl(USERDEV_CREATE_INSTANCE) */
unsigned int poll_ticks; /* Number of clock tickes (OSS_HZ) between polls. */
unsigned int match_method;
unsigned int match_key;
int mixer_dev;
userdev_devc_t *next_instance;
int rate;
int channels;
unsigned int fmt, fmt_bytes;
timeout_id_t timeout_id;
userdev_portc_t client_portc;
userdev_portc_t server_portc;
/*
* Mixer related fields
*/
int modify_counter;
int mixer_values[USERDEV_MAX_MIXERS];
};
extern oss_device_t *userdev_osdev;
extern oss_mutex_t userdev_global_mutex;
extern userdev_devc_t *userdev_active_device_list;
extern userdev_devc_t *userdev_free_device_list;
extern int userdev_create_device_pair(void);
extern void userdev_delete_device_pair(userdev_devc_t *devc);
extern int usrdev_find_free_device_pair(void);
extern void userdev_reinit_instance(userdev_devc_t *devc);
extern char *userdev_client_devnode;
extern char *userdev_server_devnode;
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